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Shopify Plus Partner Shopify Plus development agency, senior engineers only

Shopify Plus development agency for brands that outgrew the theme store.

Custom themes from Figma, Shopify to Plus migrations, headless and B2B builds, by engineers with seven-plus years on the platform. Every first call ends with a written plan and a fixed number, whether or not we work together.

Free, no sign-up. Every check runs here on the site; an engineer answers in writing within 12 hours.

Trusted by beauty, service-commerce and DTC brands

  • Gene Juarez
  • KIF
  • PawGuard
  • True Glory Hair
  • Coco Lash
  • Ouchie Snuggles
  • Valuepet
  • Myntgift

Shopify Plus development and retention agency

A senior team that builds Shopify Plus stores the way an in-house engineer would.

Aqsa Shahzad Official LLC designs, builds and migrates Shopify and Shopify Plus stores for beauty, service-commerce and DTC brands in the USA. Every line of code comes from an engineer with seven-plus years on Shopify, the person you meet on the first call is the person who builds the store, and every engagement starts with a written scope and one fixed number.

Explore the work

Read the founder’s note

400+Shopify stores shippedBeauty, service commerce and DTC $120m+GMV through stores we builtVerified with the brands 8 wksAverage launch on PlusFirst call to go-live 92%Retainers renewNo minimum term

Recognition

Case studies

Case studies from real Shopify Plus builds.

A snapshot of stores we’ve shipped. Every number here is verified and client-approved.

All case studies

Gene JuarezSalons and spas, Seattle

We’ve already solved the Zenoti problem most agencies won’t touch.

Built for Zenoti and Shopify Plus brands: a purpose-engineered theme for service-based and high-volume B2B and DTC stores that need real CRO architecture, not just a pretty homepage.

  • Booking-first architecture
  • Built for Shopify Plus
  • CRO-engineered, not decorated
Landing page to Zenoti booking
< 1 s
LCP on the homepage
1200 ms
Locations on one editable theme
13

Read the Gene Juarez case study Their review on Shopify

What we do

What Shopify Plus brands hire us for.

Scoped around your store rather than sold as a package. The plan says which of these apply to you and what each one costs.

All services

  • Shopify Plus development

    • Checkout extensibility
    • Functions
    • Flow
    • B2B and wholesale
    • Markets

    Enterprise storefronts engineered from scratch for your catalogue, traffic and team, on clean Liquid you own. Fixed scope from $40K, eight weeks to launch on most builds.

    Plus development

  • Migration to Shopify Plus

    • Magento
    • WooCommerce
    • BigCommerce
    • Shopify to Plus

    Enterprise and B2B migrations with a full 301 map, product, customer and order data reconciled row by row, a launch rehearsal and a rollback plan. Downtime is measured in minutes.

    Migrations

  • Custom theme from Figma

    • Pixel-accurate sections
    • Theme Customizer
    • UI/UX design
    • Lighthouse 90+

    Every Figma layout delivered pixel for pixel, editable end to end from the Theme Customizer, so your team changes a page without touching code.

    Figma to Shopify

  • Headless, Hydrogen and custom apps

    Headless on Hydrogen where it earns its keep, and Shopify app development for the workflows the App Store does not cover: checkout extensions, admin UI, back-office and ERP integrations.

    Headless builds

  • Conversion rate optimisation and retention

    A monthly read on revenue per visitor for stores that already have traffic, plus the email and SMS flows built around what customers actually repeat. Start with a free CRO audit.

    CRO and retention

  • Booking and service commerce

    • Zenoti
    • Appointments
    • Retail plus services

    Retail and appointments on one Shopify Plus store, including the Zenoti integration most agencies decline.

    The Zenoti build

  • SEO, speed, subscriptions and support

    The work around the build: technical SEO and GEO so the store is found in search and in AI answers, Core Web Vitals work on the live store, subscription set-ups, and month-to-month support and maintenance retainers.

    Every service

How we work

How an engagement runs, week by week.

Eight weeks from first call to launch on most builds. Weekly demos, a shared Slack channel with the engineers writing your code, and a launch manager who stays on after go-live.

Week 1

First call, first read of the store.

A written scope with fixed timelines before anything is built.

We map your funnel, tech debt and revenue leaks with the engineers who would do the work, not a sales engineer.

  1. Store, theme and app audit against Core Web Vitals and revenue per visitor

  2. A call with the senior engineer who will lead the build

  3. Written scope, timeline and one fixed number inside 12 hours

Week 1 to 2

One number, in writing.

Milestone billing, deliverables listed, no hourly meter.

The proposal is the contract: what ships, when it ships and what it costs. Changes are priced before they are built, never discovered on an invoice.

  1. Deliverables and acceptance criteria written per milestone

  2. Milestone billing, nothing due before the scope is signed

  3. Named engineers and a launch date in the plan

Week 2 to 7

Weekly demos from the people writing your code.

A transparent Notion board, a shared Slack channel and a real build to click through every week.

Sections are built the way the Theme Customizer expects, checkout extensions and Functions on Plus, headless only where it earns its keep.

  1. Weekly demo on a staging store you can click through

  2. Shared Slack channel with the engineers, no account manager in between

  3. Notion board with every ticket, estimate and status

Week 7 to 8

Launch is a checklist, not a leap.

Device-matrix QA, Core Web Vitals verified on production, SEO-safe cutover.

A rehearsal before cutover, a 301 for every URL that moves and a rollback plan that stays in the drawer.

  1. Device and browser matrix QA, checkout tested with real orders

  2. Lighthouse 90+ and Core Web Vitals verified on the live store

  3. SEO parity audit and redirect map signed off before go-live

After launch

Month to month, never locked in.

Optional CRO and retention retainer. 92% of clients renew.

Thirty days of monitoring against your pre-launch baseline, then an optional retainer for CRO experiments, feature work and priority support.

  1. 30-day monitoring on speed, indexation and conversion

  2. CRO experiments and Klaviyo flows on a monthly cadence

  3. Priority bug support and senior engineers on Slack

Why brands choose us

Six reasons brands pick Aqsa over the big Shopify agencies.

The shortlist founders, CTOs and heads of ecommerce tell us tipped the decision.

  • Shopify Plus specialists

    We don’t do WordPress or general dev. 100% of our work is Shopify and Shopify Plus, which is why builds ship faster.

  • Senior-only engineers

    No juniors billed as seniors. Every line of code is written by a 7+ year Shopify engineer with production Plus experience.

  • Speed-obsessed builds

    Lighthouse 90+ baseline on every store. Real Core Web Vitals wins, not vanity scores from a staging URL.

  • Fixed scope, fixed price

    Every engagement starts with a written scope, milestones and a fixed number. No hourly surprises, no scope creep.

  • Real partnership

    Weekly demos, direct Slack access to your engineers, and a launch manager who stays on after go-live.

  • Post-launch support

    Optional retainers for CRO, feature work and priority support. Most clients renew, but you’re never locked in.

Client reviews

What clients say once the store is live.

Four builds, four owners, in their own words. The reviews sit where they were left — Clutch, Upwork and the Shopify Partner directory — and each one is verified there.

“Aqsa has been a tenacious and consistent collaborator. She elucidated challenges and provided solutions throughout the process to improve our site. We’re so pleased with the new theme and custom functionality.”
Gene JuarezGene JuarezSalons & Spas, Seattle · Shopify Plus with Zenoti booking
  • “Every Figma layout was delivered pixel-perfect, and every text, image and block on the site is editable from the Theme Customizer — exactly the editorial control we wanted.”

    GetKif teamSmart refill brand · Figma to a custom Shopify theme

  • “Working with Aqsa was an absolute game-changer for our eCommerce business. Her deep understanding of Shopify made the entire process smooth and efficient. High-quality work, delivered on time.”

    Timothy PanicaliInventor, OuchieCap · custom Shopify theme

  • “We collaborated with a high number of Shopify CRO freelancers, and Aqsa definitely ranks in the highest bracket. Deep domain expertise, humble, hardworking and excellent communication.”

    Elevate teamEcommerce growth · CRO

The stack

We only build on Shopify, with the tools that make a Plus store run.

The App Store has thousands of options and most stores carry twenty of them. We work with a short list we have integrated many times, from loyalty and reviews to booking, subscriptions and back-office systems, so the stack is chosen for your store rather than inherited from the last agency.

Shopify Plus PartnerShopify Select Partner

  • Shopify Plusplatform
  • Hydrogenheadless
  • Klaviyoemail and SMS
  • Zenotibooking
  • Rechargesubscriptions
  • Yotporeviews and loyalty
  • Gorgiassupport
  • PostscriptSMS
  • Smile.ioloyalty
  • Loopreturns
  • Stampedreviews

Questions founders ask before the first call.

How much does Shopify Plus development cost?

Typical Shopify Plus builds we take on start at $25K for scoped rebuilds and range to $150K+ for full replatforms with custom apps, B2B and headless. Every quote is fixed-scope with milestone billing, no hourly surprises.

What is the difference between Shopify and Shopify Plus?

Shopify Plus adds enterprise features: checkout extensibility and Functions for custom checkout logic, Shopify Flow automation, Launchpad for scheduled campaigns, B2B and wholesale channels, expansion stores under one account, and higher API limits. It is built for brands doing high volume or complex commerce.

How long does a Shopify Plus build take?

Scoped rebuilds ship in 4 to 6 weeks. Full replatforms with migration, custom apps or B2B typically run 8 to 14 weeks. You get a written timeline with weekly demoable milestones before we start.

Do you offer post-launch support?

Yes. Optional retainers cover CRO experiments, feature work, priority bug support, and access to senior engineers on Slack. Most clients renew, but there is no lock-in.

Can you migrate us without losing SEO or revenue?

That is the whole point of how we run migrations. Every project ships with a full 301 redirect map, staged data migration, SEO parity audits pre- and post-launch, and a hard-gated go-live checklist. Zero revenue drop is the goal, and we hit it consistently.

Do you build custom Shopify apps?

Yes: public and private apps, checkout extensions, admin UI extensions, and backend integrations. If off-the-shelf apps do not fit your ops or add bloat, we build the exact tool you need.

The Coco Lash Shopify storefront on a laptop
The KIF Shopify storefront on a laptop
The Gene Juarez Shopify storefront on a laptop
The PawGuard Shopify storefront on a laptop

Shopify Plus experts

Let's talk Shopify, Shopify Plus and the store you actually want.

A Shopify agency and Shopify Select Partner that designs, builds, migrates, supports and grows stores for brands that have outgrown templates. Ready when you are: talk to an engineer about the project.

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